Date.prototype.Format = function (fmt) { 
    var o = {
        "M+": this.getMonth() + 1, //月份 
        "d+": this.getDate(), //日 
        "h+": this.getHours(), //小时 
        "m+": this.getMinutes(), //分 
        "s+": this.getSeconds(), //秒 
        "q+": Math.floor((this.getMonth() + 3) / 3), //季度 
        "S": this.getMilliseconds() //毫秒 
    };
    if (/(y+)/.test(fmt)) fmt = fmt.replace(RegExp.$1, (this.getFullYear() + "").substr(4 - RegExp.$1.length));
    for (var k in o)
    if (new RegExp("(" + k + ")").test(fmt)) fmt = fmt.replace(RegExp.$1, (RegExp.$1.length == 1) ? (o[k]) : (("00" + o[k]).substr(("" + o[k]).length)));
    return fmt;
}

export  function dateToString(date, parttern){
    if(parttern === '' || !parttern){
        parttern = 'yyyy-MM-dd hh:mm:ss'
    }
    return new Date(date).Format(parttern);
}

export function getFromDateAndTime(date1,date2){
    let date = new Date(date1);
    let time = new Date(date2);
    let hour = time.getHours();
    let minute = time.getMinutes();
    let second = time.getSeconds();
    date.setHours(hour);
    date.setMinutes(minute);
    date.setSeconds(second);
    return date;
}